21321033102 has 24 divisors (see below), whose sum is σ = 47788523640. Its totient is φ = 6861941520.

The previous prime is 21321033101. The next prime is 21321033109. The reversal of 21321033102 is 20133012312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321033101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20421924 + ... + 20422967.

It is an arithmetic number, because the mean of its divisors is an integer number (1991188485).

Almost surely, 2^21321033102 is an apocalyptic number.

21321033102 is an abundant number, since it is smaller than the sum of its proper divisors (26467490538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321033102 is a wasteful number, since it uses less digits than its factorization.

21321033102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40844928 (or 40844925 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21321033102 its reverse (20133012312), we get a palindrome (41454045414).

The spelling of 21321033102 in words is "twenty-one billion, three hundred twenty-one million, thirty-three thousand, one hundred two".